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# Energy Conservation

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### Energy Conservation

1. 1. <ul><li>981 Sciences for Designers </li></ul><ul><li>Week 8-II </li></ul><ul><li>The Conservation of Energy </li></ul><ul><li>Applications </li></ul><ul><li>Green or sustainable energy </li></ul>
2. 2. The science behind the deadly roller coaster ride in the movie Final Destination 3
3. 3. How to design a thrilling roller coaster ride? - This will be a project in design fundamentals in the next semester.
4. 4. Basic elements of a modern roller coaster
5. 5. The track for the roller coaster can be an artwork .
6. 6. <ul><li>The principle of a roller coaster : </li></ul><ul><li>lifting the train to a very high place . </li></ul><ul><li>Letting the train fall freely due to gravity . </li></ul><ul><li>The geometry of the track is designed to meet desired fear factor . </li></ul>
7. 7. What is the fear factor ?
8. 8. People feel afraid, or excited, when their speed or direction of motion is changing; that is, when they are accelerated . acceleration in speeding up S S 0-100km/h 12s 3.8s a a
9. 9. acceleration in changing direction a a
10. 10. What causes the sense of fear to people who are accelerating? The acceleration of an object cannot be enabled without a push or pull from another object. S S Newton’s 2nd law: F
11. 11. 50km/h S S S S rest, 0km/h a F
12. 12. An authentic example of in measuring force via acceleration interaction design MS X-Box 360 control for the next generation
13. 13. Therefore, as long as we know the acceleration of a person experienced at each points along the track, we can orchestra the variation of fear factor. But how? We need one more knowledge …
14. 14. v=0 v=0 v=0 不變
15. 15. a 不變
16. 16. Summary To design a roller coaster ride, <ul><li>lifting the train to a very high place . </li></ul><ul><li>Letting the train fall freely due to gravity . </li></ul><ul><li>The geometry of the track is designed to meet desired fear factor . </li></ul>Determine U+K Let U  K Change height & curvature (R) to acquire desired a
17. 17. 能量轉換 (between U & K ) Are they other forms of energies? 直指 : 能量守恆定律
18. 18. Why, in the tragedy in the movie, did the train stop at the top of the loop? v=0 Because some of K+U is taken away by friction , in to heat . Heat （熱） , K( 動能 ) and U （位能） are three types of energies.
19. 19. 攜帶式發電機、微型發電機 Electric energy is a potential energy. 原理： 人體運動或自然背景振動之 動能 帶動發電機之輪轉機構，轉換成 電能 。
20. 20. 綠能技術： 薄膜太陽能板 特 色： 價廉、易生產，大面積鋪設 原理： 太陽能 激活材料內光電流，轉換成 電能 。
21. 21. <ul><li>波浪如何帶動物體運動？ http:// tw.youtube.com/watch?v =tt_lqFyc6Co </li></ul>原理： 海水 動能 帶動發電機窩輪葉片，轉換成 電能 。 海浪發電
22. 22. 原理： http://tw.youtube.com/watch?v=qRUl1mJQHmc 原理： 潮汐時海水 動能 帶動發電機渦輪葉片，轉換成 電能 。 潮汐發電
23. 23. 燃料電池 ( fuel cell ) 的原理 原理： 利用 觸媒 將氫、氧混合氣體之 化學能 釋出，轉換成 電能 。
24. 24. 從能量轉換的角度看燃料電池 問題：燃料氫氣從何而來？如何產生？ H 2 , O 2 H 2 O 激發反應之能量（由觸媒提供） 釋出之能量
25. 25. 以水為燃料的車 自頭到尾，你有得到任何能量嗎？（這個設計是否跟連動債很像？） Fuel Cell Motor Transmission H 2 electrolysis H 2 H 2 O H 2 , O 2 H 2 O H 2 O
26. 26. 綠能 或永續能源的概念 ： 將 潛伏 在自然界的能量 釋出，或利用自然運動的 動能 ，轉化為 電 。 這些發電方式 不產生溫室氣體 ，或其它危害環境的廢物。所以石化燃料均不算。
27. 27. 封閉系統 開放系統 生命 位能、動能 位能、動能 熱 位能、動能 位能、動能 熱 光
28. 28. 永續性 sustainability 永續性是指一種 平衡 狀態，人類對環境之取用資源與污染，在環境 自我復癒 的能力之內。 人的 社會 自然環境 能量 資源 污染